Syrian Rue is an MAOI, and as such it is usually used as an admixture, to activate or potentiate other psychoactives (typically in ayahuasca). However, it is a psychedelic in its own right, and this is the context in which I tested it.
Regarding dosage, I found myself on the horns of a dilemma. I didn't really want an MAOI hanging around in my system, yet simultaneously I sought to engage a non-trivial experience. In the end my moderate 3g dose induced a fairly steady but unspectacular ride, which lasted for around 4-5 hours.